* {
  margin: 0;
  padding: 0;
}
img {
  display: block;
}
body {
  background: url(../image/123.jpg);
  background-repeat: no-repeat;
  background-size: cover;
}
#cas {
  position: absolute;
  width: 100%;
  display: inline-block;
  text-align: center;
}
#loginForm {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 30px 100px;
  background-color: #975d3a;
  border-radius: 20px;
  opacity: 0.8;
}
#loginForm input {
  margin: 10px 0;
  height: 30px;
  border-radius: 5px;
  border: #ccc 2px solid;
  outline: none;
}
#loginForm #inpCheckCode {
  width: 95px;
}
#loginForm #checkCode {
  margin: 10px 0 10px 5px;
  width: 57px;
  height: 30px;
  border: 1px solid #000;
  display: inline-block;
  position: absolute;
  text-align: center;
  line-height: 30px;
  border: #ccc 2px solid;
  background-color: #fff;
  border-radius: 5px;
  color: brown;
}
#loginForm #login_1 {
  width: 100px;
  height: 37px;
  color: coral;
  margin-left: 73px;
}
